Quality Control Services for Metal Furniture in Asia

Process 1. Raw Material Preparation & Cutting

Key Processes:

Procuring metal profiles (e.g., steel tubes, sheets, bars) that meet design requirements and conducting quality checks. Cutting raw materials into desired sizes and shapes using cutting equipment according to design drawings.

Main Equipment:

Laser Cutting Machines, Plasma Cutting Machines, Shearing Machines, Band Saws.

Major Problems:

High material waste, insufficient cutting accuracy, burrs on cut edges.

Process 2. Bending & Forming

Key Processes:

Performing bending, stamping, stretching, and other forming operations on cut metal components to achieve the desired geometric shapes.

Main Equipment:

CNC Tube Bending Machines, Stamping Machines, Bending Machines.

Major Problems:

Bending deformation, inaccurate dimensions, surface scratches.

Process 3. Drilling & Tapping

Key Processes:

Drilling connection holes or threaded holes in metal components to prepare for subsequent assembly or accessory installation.

Main Equipment:

Drilling Machines, Tapping Machines, CNC Machining Centers.

Major Problems:

Hole position deviation, thread damage, drill bit wear.

Process 4. Welding

Key Processes:

Joining cut, bent, and drilled metal components into the furniture frame or overall structure through welding (e.g., MIG/MAG welding, TIG welding, spot welding).

Main Equipment:

Welding Robots, Various Welding Machines, Welding Fixtures.

Major Problems:

Insufficient weld strength, weld deformation, weld spatter, incomplete fusion.

Process 5. Grinding & Fine Polishing

Key Processes:

Grinding the welded products to remove weld spatter, burrs, and surface irregularities, then performing fine polishing to achieve a smooth and even surface, providing a good foundation for subsequent surface treatment.

Main Equipment:

Grinding Machines, Polishing Machines, Belt Sanders, Hand Grinding Tools.

Major Problems:

Uneven grinding, over-grinding causing material thinning, surface scratches, dust pollution.

Process 6. Surface Treatment

Key Processes:

Applying anti-corrosion and aesthetic treatments to metal furniture, commonly including powder coating, electroplating, and anodizing. This step usually involves pre-treatment (degreasing, rust removal, phosphating) and coating/electroplating.

Main Equipment:

Powder Coating Lines, Electroplating Tanks, Curing Ovens, Pre-treatment Equipment.

Major Problems:

Poor coating adhesion, uneven coating, surface defects like orange peel, sagging, environmental issues: wastewater, exhaust gas.

Process 7. Assembly

Key Processes:

Assembling all processed metal components and other materials (e.g., wooden panels, glass, upholstery) into complete furniture products.

Main Equipment:

Assembly Lines, Power Tools, Fixtures.

Major Problems:

Large assembly tolerances, poor component fit, loose screws, low manual efficiency.

Process 8. Quality Inspection

Key Processes:

Conducting comprehensive quality inspections on finished metal furniture, including dimensions, structural stability, load-bearing capacity, surface coating quality, and functionality, to ensure compliance with design standards and safety regulations.

Main Equipment:

Dimensional Measuring Tools, Mechanical Testing Equipment, Visual Inspection Stations.

Major Problems:

Inconsistent inspection standards, manual inspection prone to omissions, and difficulty detecting minor defects.

Process 9. Packaging

Key Processes:

Cleaning and labeling qualified metal furniture, then protectively packaging them with appropriate materials (e.g., cartons, foam, bubble wrap).

Main Equipment:

Cleaning Equipment, Labeling Machines, Packaging Machines.

Major Problems:

Improper packaging leading to product damage during transportation, incorrect or unclear packaging information.